package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.controller.admin.EmployeeController;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.EmployeeNameExistException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }


    @Override
    public Result<String> save(EmployeeDTO dto) {

        //业务的健壮性判断
        Employee dbEmployee = employeeMapper.getByUsername(dto.getUsername());
        if(dbEmployee!=null){
            throw new  EmployeeNameExistException("用户"+dto.getName()+"已经存在");
        }

        //1.创建employee对象
        Employee employee = new Employee();
        //2.将dto属性值拷贝到employee对象种
        BeanUtils.copyProperties(dto,employee);
        //3.employee其他属性的初始化赋值
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes(StandardCharsets.UTF_8)));
        employee.setStatus(1);
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        //4.调用mapper插入到数据库即可
        employeeMapper.save(employee);

        return Result.success();
    }


    @Override
    public Result<PageResult> page(EmployeePageQueryDTO dto) {

        //1.mybatis分页插件
        PageHelper.startPage(dto.getPage(),dto.getPageSize());

        //2.动态sql查询即可
        Page<Employee> page = employeeMapper.pageQuery(dto.getName());

        PageResult pageResult = new PageResult();
        pageResult.setTotal(page.getTotal());
        pageResult.setRecords(page.getResult());
        return Result.success(pageResult);
    }

    @Override
    public Result<String> enableOrDisable(Long id, Integer status) {

        employeeMapper.updateStatusById(id,status);
        return Result.success();
    }

    @Override
    public Result<Employee> selectById(Long id) {

        Employee employee = employeeMapper.selectById(id);
        return Result.success(employee);
    }

    @Override
    public Result<String> update(Employee employee) {

        //设置修改的字段
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
        return Result.success();
    }
}
